#include <iostream>

using namespace std;

void fn1();
int x = 1, y = 2;

int main() {
	cout << "Begin..." << endl;
	cout << "x=" << x << endl;
	cout << "y=" << y << endl;
	cout << "Evaluate x and y in main()..." << endl;
	int x = 10, y = 20;
	cout << "x=" << x << endl;
	cout << "y=" << y << endl;
	cout << "Step into fn1()..." << endl;
	fn1();
	cout << "Back in main()..." << endl;
	cout << "x=" << x << endl;
	cout << "y=" << y << endl;
	return 0;
}

void fn1() {
	int y = 200;
	cout << "x=" << x << endl;
	cout << "y=" << y << endl;
}